The best way to know what a/c config is currently planned to operate your flight is to look at the seat map on the manage my booking section on the VS site.
There is a slight difference between the two configs, with the config having the Odyseey IFE, having 4 rows on economy seating in the mini cabin behind the downstairs PE cabin. The config that has Nova IFE only has 2/3 rows in that mini cabin.
Of course, it can, and does change from time to time, so nothing is confirmed until you are sat on the actual a/c.
Neil